Slotting-machine.



G. BRYAR.

SLOTTING MACHINE.

APPLICATION FILED APR. 1, 190e.

1,127,180. Patented Feb. 2, 1915.

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GEORGE BRYAR, OF BOSTON, MASSACHUSETTS, ASSIGNOR TO JOHN RUSH GREEN, GF

SOMEBVILLE, MASSACHUSETTS.

SLOTTING-MACHINE.

' Application filed April 1, 1908.v

vlike letters on the drawings representing like parts.

This invention relates to devices for formying apertures in metal andthe like, and has special reference todevices :tor cutting noncircularapertures. Heretoiore, in order kto cut such'an aperture in metal ithasbeen common irst to,` drill a hole at the desired point and then, bymeans of a milling or slotting tool, enlarge this opening, giving itIthelrequired outline, by cutting away the wall of the original openingin one or more directions. This process is slow and necessitates oneadjustment ofthe work for drilling the irs'thole and additionaladjustments land the use of a feeding device, and'substil tution also ofa new tool, for enlarging the` 'cal sectional 'view of the Vsame deviceattached to the usual milling machine partly f broken'away; Fig. Bis across-sectional detail on the line 3 3, Fig. 2, showing the collarsecured to the arm of the milling machine, to which my device isqadaptedto be adjustablysecured; and, Fig. 4 is a partial cross section oni thelinee-4, Fig. 2, looking down; i

My device consists iii'st of ya removable supporting frame or head 6,see Fig. 2,

i adapted to be secured to the arm 2 of the Y usual milling machine, inwhich the end of the arm and a portion of the head "of 'the millingmachine Iarev shown.

. ln order'to secure theadjustable head 6 to the collaret the head isprovided 'at its crear, r,and near the/top, withy the earsv4 32, slottedat 433 to receive screws 38, tapped Specification of Letters Patent.

Patented Feb. 2, 1915.

Serial No. 424,474.

'arms of the milling machines vary, the laterally turned split flange 35of the collar 34 is provided of a thickness that will permit it to bereamed out to fit the arm of the par- Y ticular milling machine to beused, and the ysplit iiange is provided with a set screw 36 by means ofwhich the collar may be se curely clamped upon the arm 2. y

As the distance between the spindle 8 and arm 2 of the milling machinevaries according tothe make of the particular machine, itisynecessaryfthat the head of the device may be secured to the arm 2 bysome means [capable of adjustmentgto the dimensions of the machine uponvwhich it is to be used and thisisaccomplished by means of the slotsmillingmachine must always be the saine, permits thehead to be securedto the collar, whatever be the distance ofthe collar from the spindle 3,within certain limits.

The adjustable head 6 comprises side and end members 7 and 8 and a frontorr face member 9 provided with the shoulder `10, adapted to be securedto the members 7 and 8 by screws 1'1b or any other suitable manner. Thearbors' '11, 12, 13 carrying gears 14, 15

yand 16, in mesh with each other are journaled in the members 6 and 9 ofthe adjustable head. To transmit power to these gears the arbor 11 isprovided at its rear end ywith the tapered socket 17 adapted to receivethe correspondingly shaped end 17 a of a spindle 18, the other endV ofwhich is tapered as at '19, to be received in a similarly tapered socketein the end of the spindle 3. 1When the usual chuck is employed in placeof a taper socketed spindle a suitable spindle 18 may be employed to belocked in the chuck. The spindle 18 is threaded and carries a nut '18rtvadapted to be screwed up against the end of the arbor 11 to secure abroad bearling surface for the nut and thus cause the spindle 1S to runtrue in the socket 17 The outer ends of the aibors 11, and `13 are ablock, or tool holder 22 isremovably secured byfynut's The block 22 ischanneled at 21 to "receive the shank 25 of the cutting 75 BS, ,33which, while the position of the spin- `dle 18,with respect to thespindle 3 of the the left-hand, Fig. 1, side of the tool. As

wear of the gears. An opening 31 is provided-for filling the adjustablehead withy tool, said block being also kprovided with the laterallyextended lips 26 to receive the inturned flanges 27, 27 of the lockingmembers 28, 28, which carry set screws 29, 29 by means of which the toolshank may be adjustably and securely locked in position in said channel.The tool is still further secured against lateral movement by thewedge-shaped members 30, 30 adapted to be driven in between the side ofthe tool shank and the wall of the channel, on each side.

The tool 25 is provided at its lower end with a semi-cylindrical cuttinghead 39, which in the present instance is provided with a concentricseries of cutting teeth. As the tool approaches the work the centerteeth will first engage the same. As-the tool travels its curvilinearIypath down and toward the right, Fig. 1, the teeth will progressivelyengage the work from the center to the tool ascends the teeth willprogressively engage the work from the center toward the right-hand,Fig. 1, side of the tool. It is obvious that the shape of the cuttinghead may be varied to cut openings of different outline.

If desired the gears 14, 15 and 16 may be run in oil, thus securingproper lubrication of the bearings and avoiding unnecessary oil.

c The block of material to be slotted having been secured in positionupon the universal c or other table of the milling machine, and ay'cuttingv tool of proper size and shape` having been secured inposition upon' the block 22, power is supplied from any convenientsource and rotation of the spindle 3 thereupon acts through the gears14, 15 and 16 to produce simultaneous'and like rotation of theeccentrics or cranks 11a and 12, thus to cause the block 22 and the toolcarried thereby to receive a vertical gyratory or com-.

pound motion. The work table is also gradually fed toward the tool.

When the work first meets the vertically gyratory tool only the lowestteeth of the tool will cut, but at each succeeding stroke of the tool,additional teeth engage the work and cut it away until a slot is madeequal in length to the stroke of the eccentrics or cranks 11a, 12a andthe width of the cutting tool.

It will be evident that by suitably controlling the tool holder abovethe lowermost crank to permit relatively limited movement of the upperend of the tool holder the motion imparted to the cutting tool may bevaried to produce a variety of differently shaped openings, as maybedesired.

Claims:

l. A device for use in millingmachines comprising a head, means thereonfor adjustably securing the sameto. a machine, a tool holder, a toolprovided with oppositely acting teeth, means for adjustably locking' thesame to the holder, a train of gears, simultaneously acting cranksconnected thereto, and means connecting said cranks to a machine wherebycutting motion is imparted to the tool in a plurality of substantiallyparallel planes.

A device of the class described, comprising a frame adapted to beattached to a machine having a spindle provided with a tool holdingsocket, a shaft adapted to be inserted in the socket and driven thereby,two shafts journaled in the frame, means for synchronously driving saidshafts by means of the first named shaft, cranks on said shafts, and atool holder carried on said cranks.

tool thereto determining the direction of the travel of the tool when itengages the work,

a rotatable member operatively connectedH with one end of the holder, acombined Guide and support for the opposite end of the holder,.saidguide with the rotatable member providing compound movement of the tool.

4. A device of the class described comprising a frame, adjustable meansthereon forsecuring the frame to a machine provided with a spindle, aplurality of shafts in said frame, a tool holder carried by said shafts,and means for connecting one of said shafts to said spindle.

5. A device of the class described comprising a frame, means to securethe same to a milling machine, a train of substantially verticallydisposed gears in said frame, means to impart motion thereto, cranksoperatively connected with said gears, and a tool holder actuated bysaid cranks.

6. A device of the class described comprising a frame, means to securethe same to a milling machine, a plurality of shafts in said frame,gears carried by said shafts, one of said shafts adapted to beoperatively connected with the source of power, cranks carried by aplurality of the shafts, a tool holder mounted on the cranks, a toolprovided with a series of peripherally disposed cutting members adaptedto cut progressively from ,the center of said series toward Y toolholder maybe eccentrically connected with the spindle,pthereby impartingrecipand in a plane substantially vertical relative v to thelongitudinal axis of the spindle.

8. A milling device adapted to be attached to a milling machinecomprising a tool, a tool holder, and means for eccentrically connectingthe holder with the spindle of a milling machine and imparting motion tothe tool.

9. A slotting device comprising a head, a train of gears therein havinguniformly acting cranks, a tool holder carried by the cranks, a toolprovided with a curvilinear cutting end, means for operativelyconnecting the axle of one of the gears to the spindle, and means forsecuring the head to the arm of a milling machine.

10. A milling device comprising a tool holder, a tool, means connectingthe holder with a source of power and eiecting travel of the tool in aplurality of substantially parallel paths and in a plane vertical to theaxis of the power producing member.

l1. A milling attachment comprising a support, a tool holder pivotallymounted thereon, means for connecting the holder eccentrically toadriving shaft and thereby producing compound movement of the tool.

In testimony whereof, I have signed my name to this specication, in thepresence of two subscribing witnesses.

GEORGE BRYAR.

Witnesses:

FREDERIC GILBERT BAUER, EVERETT S. EMERY.

Copies of this patent may be obtained for ve cents each, by addressingthe Commissioneriof Patents, Washington, 2D. C.

